examples: refine tensor_sum_elements(tensor dump) in examples/benchmark/benchmark-matmult.cpp

[jeffzhou2000]

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BTW, can the original author or core maintainer add a

void ggml_tensor_print(const struct ggml_tensor * tensor, const char * name) 

utility function (with all supported data type and dump the accurate value in the tensor as m ( < 8) x n ( < 8) format) in ggml.h&ggml.c, it will might be very useful/helpful for programmers/developers. thanks so much.

[ngxson]

LGTM. Let's merge when the CI pass.

[slaren]

What is the goal of these changes when this function is only called with F32 tensors?

[jeffzhou2000]

What is the goal of these changes when this function is only called with F32 tensors?

programmer/developer might be change data type in this example manually. this PR has no any side-effect.

accordingly, it will helpful for ggml's users(programmers/developers) if there is a tensor dump utility function in ggml.h&ggml.c. this is preparation.of course, this utility function can be provided by you or the original author because you are both expert.

[slaren]

There is code for printing tensors in the eval-callback example. We could consider moving and possibly extending the functions used to do this in eval-callback to common.cpp so that it is easier to use them during debugging.

[jeffzhou2000]

your concern is make sense. you can make/made any decision as your consideration because you are one of the owners/core maintainers of this project.

[jeffzhou2000]

LGTM. Let's merge when the CI pass.

thanks for your help and thanks so much and have a good weekend.

[ngxson]

Good point @slaren , I haven’t looked deeper into this file.

@zhouwg I’m a bit doubt about the purpose of this function. Just to be sure: do you need this func to print the tensor? It seems to me that the current func only calculate the sum, but not for printing it out.

[jeffzhou2000]

Good point @slaren , I haven’t looked deeper into this file.

@zhouwg I’m a bit doubt about the purpose of this function. Just to be sure: do you need this func to print the tensor? It seems to me that the current func only calculate the sum, but not for printing it out.

your are right.this function following the existing tensor_sum_elements but the calculation process can be used for tensor dump,